<template>
  <view class="index" :style="{overflow:'hidden',height:pageHeight}">
    <!-- 搜索 -->
    <search @search="disScroll" />
    <!-- 轮播图 -->
    <view class="slider">
      <swiper
        autoplay
        interval="2000"
        circular
        indicator-dots
        indicator-color="rgba(255,255,255,1)"
        indicator-active-color="rgba(255,255,255,.6)"
      >
        <swiper-item :key="item.goods_id" v-for="item in swiper">
          <navigator :open-type="item.open_type" :url="'/packone/goods/index?id='+item.goods_id">
            <image :src="item.image_src" />
          </navigator>
        </swiper-item>
      </swiper>
    </view>
    <!-- 功能导航 -->
    <view class="navs">
      <navigator
       :open-type="item.open_type?item.open_type:'navigate'"
       :url="i===0?'/pages/category/index':'/packone/list/index?query='+item.name"
       :key="item.image_src" v-for="(item,i) in navs">
        <image :src="item.image_src" />
      </navigator>
    </view>
    <!-- 栏目楼层 -->
    <view class="floors">
      <!-- 遍历楼层 -->
      <view class="floor" :key="item.floor_title.name" v-for="item in floors">
        <!-- title -->
        <view class="ftitle">
          <image :src="item.foor_title.image_src" />
        </view>
        <!-- pics -->
        <view class="fitem">
          <navigator :url="'/packone/list/index?query=' +prd.name" :key="prd.name" v-for=" prd in item.product_list">
            <image :src="prd.image_src" />
          </navigator>
        </view>
      </view>
    </view>
    <!-- 底部提示 -->
    <view class="end">
      <text>我是有底线的！</text>
    </view>
    <!-- 回到顶部 -->
    <!-- v-show 在uni-app中有的时候不生效 换成v-if就可以了 -->
    <view @click="goTop" v-if="isShowTop" class="goTop icon-top"></view>
  </view>
</template>

<script>
// 导入组件
import search from "@/components/search";
// import request from "@/utils/request"
export default {
  data() {
    return {
      pageHeight: "auto",

      // 轮播图
      swiper:[],

      // 导航栏
      navs:[],

      //栏目楼层
      floors:[],

      // 页面滚动高度 如果页面滚动高度>半屏高度 == 显示回到顶部按钮
      scrollTop:0
    };
  },

  computed: {
    // 是否显示回到顶部按钮
    isShowTop () {
      return this.scrollTop > this.wh
    }
  },

  // 注册组件
  components: {
    search
  },
  onLoad() {
    this.getSwiper()
    this.getNavs()
    this.getFloors()

    // js 方式刷新页面
    // 开启下拉刷新
    // uni.stopPullDownRefresh()

    // 获取屏幕数据高度 => 回顶按钮的条件  存储到组件实例上
    this.wh = uni.getSystemInfoSync().windowHeight/2
  },

  // 页面滚动会触发  
  onPageScroll (e) {
    this.scrollTop = e.scrollTop

  },

  // 关闭下拉刷新  需要手动关闭
  // onReady() {
  //   uni.stopPullDownRefresh()
  // },

  // 下拉刷新时会触发
  onPullDownRefresh () {
    // 重新发送ajax请求=>获取响应数据=>刷新页面
    // 通常在启动多个异步任务并发运行并等到所有异步任务完成后=>获取所有的结果
    Promise.all([this.getSwiper(),this.getNavs(),this.getFloors().then((res=>{
      console.log(res);

      // 关闭loading效果
      uni.stopPullDownRefresh()
    }))])
  },
  methods: {
    // 搜索时禁止页面滚动
    disScroll(e) {
      this.pageHeight = e;
    },

    // 回到顶部
    goTop() {
      uni.pageScrollTo({
        scrollTop: 0
      })
    },

    // 获取轮播图数据
    async getSwiper() {
      const {msg,data} = await this.request({
        url:"/home/swiperdata",
      })
      if (msg.status === 200) {
          console.log('swiper',data);
          this.swiper = data
      }
    },
    // 获取功能导航
    async getNavs() {
      const {msg,data} = await this.request({url:'/home/catitems'})
      if (msg.status === 200) {
        this.navs = data
      }
    },
    // 获取楼层数据
    async getFloors() {
      const {msg,data} = await this.request({url:'/home/floordata'})
      if (msg.status === 200) {
        this.floors = data
      }
    }
  }
};
</script>

<style lang="scss">
.index {
  // 轮播
  .slider {
    swiper,
    image {
      width: 750rpx;
      height: 340rpx;
    }
  }
  // 功能导航
  .navs {
    display: flex;
    padding: 30rpx;
    background: #fff;
    justify-content: space-between;
    navigator {
      width: 128rpx;
      height: 140rpx;
    }
  }

  // 栏目楼层
  .floor {
    .ftitle {
      padding-top: 30rpx;
      background: #f4f4f4;
      image {
        width: 750rpx;
        height: 60rpx;
      }
    }
    // pics
    .fitem {
      padding: 20rpx 16rpx 10rpx;
      overflow: hidden;
      navigator {
        float: left;
        width: 193rpx;
        height: 188rpx;
        margin-left: 10rpx;
        margin-bottom: 10rpx;
      }
      navigator:nth-child(1) {
        width: 232rpx;
        height: 386rpx;
        margin-left: 0;
      }
      navigator:nth-child(2),
      navigator:nth-child(5) {
        width: 273rpx;
        height: 188rpx;
      }
    }
    &:first-child {
      .fitem {
        navigator {
          width: 233rpx;
        }
      }
    }
  }
  .end {
    text-align: center;
    font-size: 24rpx;
    color: #999;
  }
  .goTop {
    position: fixed;
    bottom: 30rpx;
    /* #ifdef H5 */
    bottom: 65px;
    /* #endif */
    right: 30rpx;

    display: flex;
    justify-content: center;
    align-items: center;
    width: 100rpx;
    height: 100rpx;
    font-size: 48rpx;
    color: #666;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.8);
  }
}
</style>
